201011231 has 2 divisors, whose sum is σ = 201011232. Its totient is φ = 201011230.

The previous prime is 201011219. The next prime is 201011249. The reversal of 201011231 is 132110102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201011231 - 2¹⁴ = 200994847 is a prime.

It is a super-2 number, since 2×201011231² = 80811029976270722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201013231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100505615 + 100505616.

It is an arithmetic number, because the mean of its divisors is an integer number (100505616).

Almost surely, 2^201011231 is an apocalyptic number.

201011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

201011231 is an equidigital number, since it uses as much as digits as its factorization.

201011231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 201011231 is about 14177.8429600557. The cubic root of 201011231 is about 585.7875102725.

Adding to 201011231 its reverse (132110102), we get a palindrome (333121333).

The spelling of 201011231 in words is "two hundred one million, eleven thousand, two hundred thirty-one".